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Trace fossil of???


paleoman1234

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paleoman1234

Trilobite or worm trail? Or something else?

Found near red river gorge in Kentucky.

Size: 5" x 3.5" x .5"

20180603_041657.jpg

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Fossildude19

Looks like very worn crinoid stem imprints to me.

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I'm not convinced by crinoids, they look rather uneven.

Maybe this sort of thing (which has been shown a few times on the forum. I'm afraid I can't remember the original source - I tried searching and Tim showed it a few years ago. :) ):

5b13ca2a9dc20_ScreenShot2017-02-14at12_02_41.png.d2dbc4e853957825940d886940128525.png

 

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Spongy Joe

I'm with Tarquin here - some sort of trace fossil. The giveaway is in the upper middle, where it goes underneath a layer of sandier matrix. There's certainly no crinoid, or cornulitid tube (I wondered for a minute!), or coal (I also wondered at eroded moulds of lycopod branches)... it's just an impression. Splitting off the remainder of that layer may show more detail.

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indominus rex

I agree. It looks more like trace fossils than crinoids. I think trilobite but I could be completely wrong. Let's see what the experts say

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Trace fossils indeed. I would expect a greater degree of duality and more feather like marks by the appendages of trilobites though.

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Scalarituba missouriensis is a prolific trace fossil in the Mississippian of Kentucky:

 

IMG1.thumb.png.ddbda861e7aa5537033c33dac2fd0b65.png

 

figure from:

 

Conkin, J.E., & Conkin, B.M. 1968

Scalarituba missouriensis and its stratigraphic distribution.

The University of Kansas Paleontological Contributions, 31:1-7   PDF LINK

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